METHOD OF AND APPARATUS FOR COLD FORMING TOOTHED WHEELS FROMSHEET METAL,申请号CA19922086043-传众专利搜索

METHOD OF AND APPARATUS FOR COLD FORMING TOOTHED WHEELS FROMSHEET METAL

申请公布号：CA2086043(A1)

申请号：CA19922086043

申请日期：1992.12.22

申请公布日期：1993.08.14

申请人：

FRIESE, UDO

发明人：FRIESE, UDO

分类号：B21D53/28;B21H5/02;(IPC1-7):B21K1/32

主分类号：B21D53/28

摘要：METHOD OF AND APPARATUS FOR COLD FORMING TOOTHED WHEELS FROM SHEET METAL A one-piece gear with an externally toothed rim extending at right angles to the hub of the gear and preferably having a smooth internal surface is obtained by converting a circular disc-shaped blank of ductile metallic material into a preform with a concavo-convex or otherwise configurated flange extending to one side of the central portion of the thus deformed blank. The central portion of the deformed blank is clamped between the sections of a first rotary tool while an externally toothed second rotary tool advances radially toward the first tool to convert the flange into an externally toothed rim within a space which is defined in part by a peripheral recess of the first tool and in part by a registering peripheral recess of the second tool.